860 Union St, Brooklyn, NY 11215

Listing office RE/MAX Real Estate Professiona v***@aol.com Show Phone

Listing date Mar 12, 2026

Source Elliman

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Overview

Located in the Park Slope neighborhood of Brooklyn, New York City, this building was originally constructed as the Victorian Gothic carriage house of the Maxwell mansion, which existed sometime between 1875 and 1896, before being demolished in 1922. In 1923, the 25-foot wide carriage house received a new facade designed by Caughey & Evans. As one of the few remaining carriage houses in Park Slope, it is considered a local attraction. Situated within the Park Slope Historic District, it is located minutes from the park. The building is currently configured as a two-family residence, each unit featuring 3 ensuite bedrooms, a formal living room, a formal dining room, and a kitchen. The property contains original woodwork and crafted details, including mantle fireplaces, built-in China cabinets, parquet floors, stained glass, and tall ceilings. The property is located in prime Park Slope, surrounded by amenities in one of Brooklyn’s most desirable neighborhoods. The property could also be converted into a single-family mansion.

Suggested Use

Law Firm Accounting Firm Nursing Home Nursing Home Building Supply Auto Parts Store Computer & Electronic Repair (Bike/Boat/Book/etc) Store Tech Support Center Travel Agency

Zoning and permitted uses should be independently verified with local authorities.

Location Insight

• Map
• Local Demand

City

Brooklyn

County

Kings

State

New York

Longitude

-73.9738

Latitude

40.6736

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FAQs

What type of property is this?

Duplex - Unique two-family residence or single-family conversion opportunity in prime location.

Where is this duplex located?

The property is located at 860 Union St Brooklyn, NY.

What is the asking price?

The asking price for this property is $3,750,000.

What are key features of this property?

This property features: Rare 25' wide carriage house in Park Slope Historic District.; Potential for conversion to a single‑family mansion.; Original architectural details: mantle fireplaces, built‑in China cabinets, parquet floors, stained glass, tall ceilings.